共查询到19条相似文献,搜索用时 156 毫秒
1.
针对整流器类多焊缝结构类零件在钎焊后的焊缝处出现开裂、局部变形较大(直径方向上最大变形在0.5 mm以上)、个别焊缝钎焊不合格需进行补焊等问题进行原因分析,并根据分析结果设计解决方案。经过对数次工艺试验的反复论证,并针对每次工艺试验的结果作出相应的改进,提出相应的改进方案,最终解决了此类零件钎焊难题。并提炼总结出了加工此类零件切实可行的工艺方法,这对以后类似问题的探究与解决提供了指导与帮助。 相似文献
2.
薄带环件与蜂窝在进行真空钎焊时,因其为带材加工,在钎焊前定位蜂窝难度大,从而焊接强度非常差,钎焊过程中不仅容易变形,钎焊质量也难以保证,本文针对该结构的钎焊前钎料的填充、蜂窝的定位方法、钎焊工艺、变形控制方法等进行探索和研究,并通过试验分析,确定了该特殊结构的蜂窝钎料填充方法、定位点焊方法和控制零件热循环变形的方法,从... 相似文献
3.
4.
5.
6.
针对液(气)压缸在使用中产生的磨损、划伤、鼓肚、点蚀等缺馅后,对比分析了电镀、热喷涂、热变形、涂胶、有机涂层填补、钎焊、电弧焊补及冷变形等修复工艺,指出冷变形工艺成本较低,适应于大批量、机械化大生产的需要. 相似文献
7.
8.
《机械工人(冷加工)》1976,(2)
我厂从1972年开始使用巴氏合金钎焊修复机床导轨,先后修复了龙门刨床、摇臂钻床、铣床、磨床、车床等导轨划伤,效果很好,具有工艺简单,成本低,变形小,不脱落等优点。如我们曾用这种方法修复六米龙门刨,导轨全长有一条宽1毫米,深0.20~0.30毫米的研沟,钎焊后全长变形不超过0.01毫米。基本原理:巴氏合金钎焊是将导轨划伤部位经过清洗之后,进行快速无 相似文献
9.
10.
王代富 《仪表技术与传感器》1981,(2)
在仪表制造中,经常遇到不锈钢波纹管与配件的组装焊接工艺问题。有的仪表,由于技术要求,不允许高温加热钎焊,只能低温加热钎焊,即称为软钎焊。有的同志反映,用铬铁钎焊不锈钢波纹管焊不上,困难较多。其实,只要掌握了它的工艺要点,不锈钢波纹管的软钎焊是没有困难的。下面就介绍这方面的工艺要点。 相似文献
11.
12.
Fenggui Lu Binfeng Lu Xinhua Tang Shun Yao 《The International Journal of Advanced Manufacturing Technology》2008,37(9-10):961-965
Laser brazing is applied to the zinc-coated steel plate welding for its superior processing property. The delivery stability of filler metal such as the position of filler wire tip relative to laser focal point centre and the existence time of liquid filler metal are the key technologies in laser brazing. Also, due to the addition of the filler metal, the changeable factors increase in the process of brazing, so matching and optimizing of the processing parameters are important. In this paper, different influencing factors of laser brazing such as wire feeding stability, laser power distribution and galvanized layer, and parameters affecting the laser brazing process including the laser system, base material, filler metal and processing conditions were analysed and tested by experiments. Optimizing parameters were also acquired and used to laser braze lap joint of zinc-coated steel plate. Joint performance and quality were tested by micro-hardness testing, macro-metallographic analysis and SEM analysis. The results proved that laser brazing joints have good intensity and corrosion resistance. 相似文献
13.
14.
15.
16.
Cu基钎料电弧钎焊接头强度及断口分析 总被引:2,自引:0,他引:2
研究用钨极氩弧焊作为热源,用Cu3Si1Mn钎料、56Cu8Mn26Zn钎料分别钎焊A3钢板及1Cr18Ni9Ti不锈钢板。试验结果表明,在钎料/母材界面分别存在Si、Mn富集带,经XRD分析表明,Si是以Fe2Si相形式存在,而Mn是以固溶体形式存在;用Cu3Si1Mn、56Cu8Mn26Zn钎料钎焊A3钢板接头抗拉强度试样均断在母材,抗拉强度为308.2~308.7MPa,钎焊1Cr18Ni9Ti不锈钢板,拉伸均断在钎缝,其抗拉强度分别是331.5 MPa、382.9 MPa;拉伸断口分析发现,断裂起裂点在搭接钎缝的根部,主要是母材成分与少量的钎料成分混合、溶解而成,是脆性断口;止裂点在钎缝金属中(Cu3Si1Mn钎料)或在近界面上(Cu3Si1Mn钎料),是塑性断口。 相似文献
17.
Lu Xueqin Yang Shanglei Wu Yixiong School of Materials Science Engineering Shanghai Jiaotong University Shanghai China 《机械工程学报(英文版)》2005,18(1):42-45
Stainless steel is so different from aluminum alloys in physical and chemical characters. When they are welded directly, there tend to be Al-Fe brittle compounds on the joint. This paper investigates the processing performance, interface microsturctures and mechanical properties of aluminum alloys/stainless steel by way of brazing after brush plating a Ni/Cu transitional layer on stainless steel. After the joints are brazed with Al-Si-Cu-Mg-Zn foil brazing filler metal on different brazing parameters, both the mechanical properties and the microstructures are satisfactory for application. And the influence of the brazing parameters on bonding quality of the brazed joints is discussed in detail. The results reveal that no brittle Al-Fe intermetallic Compound is found in the interfaces. The Ni/Cu electroplating layer effectively hinders the diffusion of Fe atoms from SUS304 to 5A03. Though a little AlCu3 brittle compound is produced, its quantity is too small to affect the strength of the joint. 相似文献
18.
真空铝钎焊工艺所使用的夹具通常采用不锈钢制作。本文研究了精密焊接件的装夹底模板的制造工艺。该底模板材质采用0Cr25Ni20低碳耐热钢,其装夹表面是焊接件的尺寸基准面。由于底模板的尺寸公差将直接影响焊件的钎焊质量,因此,在钎焊加热一冷却过程中应保证底模板有足够的尺寸公差。微小的残余应力是底模板能够满足工作要求的关键因素。由于在焊接和机械加工底模板的过程中,都不可避免的会产生残余应力;因此,应采用合理的加工工艺及方法,才能制作出微应力和高精度的底模板。 相似文献